Measurement of proportion of lower facial height and it’s significance in different age, sex and ethnicity

Shyam KajiMaharjan, SR BMathema

Abstract

Background: The lower facial third is divided into upper one third from base of the nose to commissural line and lower two third from commissural line to lower border of the chin. This proportion may not be true for all population of different age, sex and ethnicity. Purpose: To determine the proportion of lower facial height and to correlate its significance in different age, sex and ethnicity.

Material and methods:Convenient sampling was done among different age group of both sexes above 18 years. The 111 subjects (40 Male and 71 Female) were separated into three age groups. It consist of 58 Aryan and 53 Mongolian ethnics group. Vertical distance from the base of the nose to commissural line (upper one third of the lower facial height) and vertical distance from the commissural line to the lower border of the chin (lower two third of the lower facial height was measured by vernier calliper respectively. Results. Proportion of upper one third to lower two third of the lower facial height was found more in 71.17 % , less in 19.83 % and equal in 9% of the total sample. Conclusions: It was found that proportion of upper one third to the lower two third of the lower facial height was greater in our study population. Proportion of lower facial height was not statically significant with age, sex and ethnicity.